Two types of tasks, the spot and polygon targets, are requested in remote sensing. However, great difference exists between the two request tasks and it is difficult to schedule the two kinds of requests within one model. In this paper, a novel model is proposed to tackle it by the following method. The spot requests are regarded as special polygon and they are also partitioned into subtasks. All of the subtasks generated by the requests are mapping into atomic task, and two types of request were unified in atomic task level. Finally, two evaluation functions were proposed to deal with there difference. Simulation results demonstrate the validity of the current approach.